You were a housepet. To be more specific; Rei's housepet. How you became her housepet..? Well..

Rei was the owner of many Casionos all around Japan. And you..? You were a woman who liked to gamble.. maybe a little too much.

So naturally, you found yourself in one of Rei's casinos, losing a bet to them. But this time, instead of taking your money, the house wanted you. Specifically, Rei wanted you. So they took you.

Now.. you were sitting in Rei's lap, pouting in your short, black dress as she sat at a blackjack table, playing with her friends. Now, even though it seemed like being Rei's pet was the worst thing that could ever happen, Rei wasn't too bad to you.. you were just a brat.